Nemo, Texas is a small unincorporated community located in Johnson County, in the central part of the state. The climate in Nemo is considered to be humid subtropical, characterized by hot summers and mild winters. The average high temperature in the summer months hovers around 95°F (35°C), while winter temperatures usually range from 40°F (4°C) during the day to around freezing at night.

Hydrologically, Nemo is situated in the Brazos River watershed, with several creeks and streams running through the area. These waterways contribute to the overall beauty of the region and provide opportunities for various outdoor activities, such as swimming, fishing, and boating.

In terms of outdoor recreation, Nemo offers plenty of opportunities for nature enthusiasts. The area is home to numerous parks and nature reserves, providing space for hiking, camping, and picnicking. Nearby Cleburne State Park offers a range of activities, including fishing, boating, and biking, while the Chisholm Trail Outdoor Museum allows visitors to explore the history of the famous cattle trail.

Overall, Nemo, Texas provides a pleasant climate, diverse hydrology constituents, and a variety of outdoor recreation opportunities for both locals and visitors to enjoy.